From 69c88dc7d9f1a6c3eceb7058111677c640811c94 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Sat, 19 Oct 2013 14:57:07 -0700 Subject: vfs: fix new kernel-doc warnings Move kernel-doc notation to immediately before its function to eliminate kernel-doc warnings introduced by commit db14fc3abcd5 ("vfs: add d_walk()") Warning(fs/dcache.c:1343): No description found for parameter 'data' Warning(fs/dcache.c:1343): No description found for parameter 'dentry' Warning(fs/dcache.c:1343): Excess function parameter 'parent' description in 'check_mount' Signed-off-by: Randy Dunlap Cc: Miklos Szeredi Cc: Al Viro Signed-off-by: Linus Torvalds --- fs/dcache.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) (limited to 'fs/dcache.c') diff --git a/fs/dcache.c b/fs/dcache.c index 41000305d71..20532cb0b06 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1331,14 +1331,6 @@ rename_retry: * list is non-empty and continue searching. */ -/** - * have_submounts - check for mounts over a dentry - * @parent: dentry to check. - * - * Return true if the parent or its subdirectories contain - * a mount point - */ - static enum d_walk_ret check_mount(void *data, struct dentry *dentry) { int *ret = data; @@ -1349,6 +1341,13 @@ static enum d_walk_ret check_mount(void *data, struct dentry *dentry) return D_WALK_CONTINUE; } +/** + * have_submounts - check for mounts over a dentry + * @parent: dentry to check. + * + * Return true if the parent or its subdirectories contain + * a mount point + */ int have_submounts(struct dentry *parent) { int ret = 0; -- cgit v1.2.3-70-g09d2 From 358eec18243ac025b2eb0317ab52bd247e1b03c6 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Thu, 31 Oct 2013 15:43:02 -0700 Subject: vfs: decrapify dput(), fix cache behavior under normal load We do not want to dirty the dentry->d_flags cacheline in dput() just to set the DCACHE_REFERENCED flag when it is already set in the common case anyway. This way the first cacheline of the dentry (which contains the RCU lookup information etc) can stay shared among multiple CPU's. This finishes off some of the details of all the scalability patches merged during the merge window. Also don't mark dentry_kill() for inlining, since it's the uncommon path and inlining it just makes the common path slower due to extra function entry/exit overhead. Signed-off-by: Linus Torvalds --- fs/dcache.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/dcache.c') diff --git a/fs/dcache.c b/fs/dcache.c index 20532cb0b06..ae6ebb88cef 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -542,7 +542,7 @@ EXPORT_SYMBOL(d_drop); * If ref is non-zero, then decrement the refcount too. * Returns dentry requiring refcount drop, or NULL if we're done. */ -static inline struct dentry * +static struct dentry * dentry_kill(struct dentry *dentry, int unlock_on_failure) __releases(dentry->d_lock) { @@ -630,7 +630,8 @@ repeat: goto kill_it; } - dentry->d_flags |= DCACHE_REFERENCED; + if (!(dentry->d_flags & DCACHE_REFERENCED)) + dentry->d_flags |= DCACHE_REFERENCED; dentry_lru_add(dentry); dentry->d_lockref.count--; -- cgit v1.2.3-70-g09d2